Oxlade-Chamberlain made his first Premier League start since April of 2018 last week in the 2-1 win at Southampton.
A horrendous knee injury resulted in the former Arsenal winger - a £40 million signing two years ago [The Guardian] - missing around 12 months of action.
He was one of Liverpool's best players at St Mary's last weekend, having endured a difficult night in the Super Cup win over Chelsea in Istanbul.
And with the visit of his former club on the horizon, Klopp says that the 26-year-old is looking great in every possible way.
He told Liverpool's YouTube channel: "Alex I would say is in the best shape I can remember. He looks good. Not only physically and he's in good but mentally very good. We need him so all is like it should be."
Both Liverpool and Arsenal have 100 percent records to protect, but something's got to give tonight.
Anfield plays host as the European champions look to make it three wins from three, and Oxlade-Chamberlain will be desperate to start and impress against the Gunners, whom he joined in 2011.
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